Zintl border
The Zintl limit or Zintl line is an imaginary line in the periodic table of the elements . It lies between the third and fourth main groups and plays a role in the chemistry of the Zintl phases , i.e. compounds of elements from groups 11–16 with alkali or alkaline earth metals . The term was coined by Fritz Laves in honor of the German chemist Eduard Zintl after his death.
This line separates two types of Zintl phases. Elements that lie to the right of this line, i.e. those of the 4th – 6th Belong to the main group, form stoichiometrically structured, salt-like compounds with alkali and alkaline earth metals . Elements that lie to the left of the Zintl limit, i.e. elements of the 3rd main group and the 1st and 2nd subgroups, thus form alloy-like Zintl phases whose stoichiometry is not precisely defined.
Polyanions , in which the anions are built up from smaller clusters, are characteristic of many elements to the right of the Zintl boundary . However, polyanionic compounds are now also known from elements such as indium or thallium .
Individual evidence
- ↑ John D. Corbett: Polyanionic Clusters and Networks of the Early P-Metals in the Solid State: Beyond the Zintl Limit. In: Angewandte Chemie. 2000, 112, 4, pp. 682-704, doi : 10.1002 / (SICI) 1521-3757 (20000218) 112: 4 <682 :: AID-ANGE682> 3.0.CO; 2-3 .
literature
- Fritz Laves: Eduard Zintl's work on the chemistry and structure of alloys. In: Natural Sciences. 1941, 29, 17, pp. 244-255, doi : 10.1007 / BF01479157 .
